Rifle Identification

I was looking at one more rifle today but can't seem to find any information on it.

The barrel is labeled "Rosh K.R. Cama & Co. London Superior English Manufacture." There is engraving on the main body of the carbine and down the top of the barrel.

I can't seem to find anything on this company and was wondering if anyone had heard of it. I will try to get some photos uploaded to this site over the next couple of days but was looking for some initial information.

A minor correction, the barrel is actually labelled "SURrosh ....." Once I cleaned a little I found the beginning of the name. I think this is a Muscat Martini Carbine, the engraving on the block looks somewhat similar to markings on a Muscat that I found images of, it appears to be around an 1880 model. I will still get photos up this weekend.